...with shampoo and conditioner anyway. I have been using baking soda water (in an old shampoo bottle) as shampoo and using apple cider vinegar as a rinse.
You do not want to get the vinegar in your eyes!! It leaves your hair with a slight smell of vinegar but I don't mind that. I've also tried not using the vinegar and just the baking soda. Either way, my hair stays cleaner longer and I don't have to wash it everyday like I have to with regular shampoo (if I choose not to anyway). It's cheap and though it takes time to get use to the lack of lather, I think I like it.